Add delete icon to Hidden Terminals menu item

[Copilot]

Adds a trash icon to the Hidden Terminals menu item that deletes all hidden chat terminals at once. Previously, users had to open each hidden terminal individually and delete them one by one.

Changes

• Added delete button to TerminalTabsChatEntry

  • Trash icon (Codicon.trashcan) positioned after the label
  • Calls ITerminalService.safeDisposeTerminal() for each hidden terminal in parallel
  • Click handler stops propagation to prevent opening quick pick
  • Keyboard support (Enter/Space) with full ARIA labels

• Styled delete button in terminal.css

  • 16x16px with hover opacity transition (0.8 → 1.0)
  • Hover background with 3px border-radius
  • Hidden in icon-only mode (no text labels)

UI

Before:  [💬] 2 Hidden Terminals
After:   [💬] 2 Hidden Terminals [🗑️]
         ^                       ^
         Opens quick pick        Deletes all

Original prompt

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This section details on the original issue you should resolve

<issue_title>Add a delete icon to Hidden Terminals menu item</issue_title>
<issue_description>

Currently, in order to delete/clean up hidden terminals created by AI models I need to:

1. Click the Hidden Terminals menu item in the terminal side bar
2. Select a hidden terminal in the command palette to open it
3. Click the trash icon in the terminal side bar for the given terminal menu item
4. Repeat for every single hidden terminal

It would be great if the Hidden Terminal menu item also had a trash icon so I could clear them all in one swoop.</issue_description>

Comments on the Issue (you are @copilot in this section)

@Tyriar I'd use this too 👍

• Fixes Add a delete icon to Hidden Terminals menu item #286958

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Fixes #275235

[meganrogge]

@Tyriar I changed it so it only shows on hover or keyboard focus. WDYT?

delete.mov

[Copilot]

Pull request overview

This PR adds a delete button to the Hidden Terminals menu item in the terminal tabs view, allowing users to delete all hidden chat terminals at once instead of opening and deleting them individually.

Changes:

• Added a trash icon button to TerminalTabsChatEntry that deletes all hidden chat terminals in parallel
• Implemented click and keyboard handlers with proper event propagation control
• Styled the delete button with hover effects and visibility rules in CSS

Reviewed changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated no comments.

File	Description
src/vs/workbench/contrib/terminal/browser/terminalTabsChatEntry.ts	Added delete button DOM element, event handlers for click and keyboard interactions, and _deleteAllHiddenTerminals method with proper ARIA labels
src/vs/workbench/contrib/terminal/browser/media/terminal.css	Added styling for delete button with hover states, display rules for when tabs have text, and visibility control

[Tyriar]

Can we keep the hidden terminals text stable, but do similar to hovering the other items?

Maybe that should go with just moving it to be left aligned now too as we've had feedback to do that too.

[meganrogge]

Done

addressed